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Finding the Fourth Proportional to 1,255.62, 1,882.25 and 638.60

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Solution

The fourth proportional to 1,255.62, 1,882.25 and 638.60 is: 957.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.62 : 1,882.25 = 638.60 : x
  2. Step 2: Convert to fraction form
    1,255.62/1,882.25 = 638.60/x
  3. Step 3: Cross multiply
    1,255.62x = 1,882.25 × 638.60
  4. Step 4: Simplify right side
    1,255.62x = 1,202,006.36
  5. Step 5: Solve for x
    x = 1,202,006.36/1,255.62
  6. Step 6: Final answer
    x = 957.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.